神经耳科学检查对听神经瘤的诊断意义

目的：探讨神经耳科学检查对听神经瘤的诊断意义。方法：对１３例听神经瘤行纯音测听，声导抗，眼震电图，听性脑干诱发电位（ＡＢＲ），耳蜗电图及面神经电图等神经电生理检查。结果：患侧纯音听阈１例正常，另４例２ｋＨｚ以下在正常范围，声导抗镫肌反射试验结果不一，冷热试验８例患侧半规管麻痹，均伴有一项或多项视－前庭眼动眼震异常；ＡＢＲ２例未能引出，敏感度为９０．９％；７例面神经电图异常；３例面神经电图异常；３例

Neurootologic study of acoustic neuroma

Objective:To summarize the outcome of neurootologic examination of acoustic neuroma and study of diagnostic significance of neurootologic examination on acoustic neuoma.Method:13 patients were examined with pure tune test,acoustic immittance,electronystagmography,acoustic brainstem evoked response,electrocochleogram,otoacoustic emissions and facial electronurography.Result:All patients had subjective hearing loss.One patient had normal pure tone audiogram,other 4 patients had normal pure tone test at the frequency <2000 Hz.The outcome of acoustic immittance is various.5 patients were normal in caloric test,but all were abnormal in visual vestibular optokinetic response.ABR are positive in 90.9 % of cases,but 2 patients had no response.7 patients were abnormal in facial electroneurography,3 (of 3) eletrocochleogram and 2 (of 2) otoacoustic emissions revealed retrocochlear patholgoy.Conclusion:Neurootologic examination played important role in filtering diagnosis of acoustic neuroma,results should be considered synthetically,acoustic neuroma should not be ruled out if any one test was negative.